Class I lever : Beam balance :: Class II lever : ?
Wheel barrow
Pliers
Sea-saw
A forearm
Wedge : Knife :: Wheel and axle : ?
Nail
Axe
Screw
Screw driver
What is a simple machine?
Tool that gives electricity to other machines
A machine that does only one job
Any tool that makes work easier
A machine that is made up of many smaller parts
The force applied on the machine by the user is known as :
Load
Effort
Fulcrum
Efficiency
Pick out the odd one.
Knife
Needle
Door knobs
You need to lift a piano to the third floor. Which simple machine would not work?
Pulley
Lever
Inclined plane
Wedge
A knife is an example of which class of lever?
First
Second
Third
Fourth
Water can be drawn from the well with the help of ,which of the following equipment ?
Wheel-and-axle
Efficiency = ?
The number of simple machines identified by the scientists is :
6
7
5
10
